Fig. 9. Model for glide pathway in tendon cell development. While Hh and Wg signaling directly control stripe expression in border cells, they act indirectly (dotted arrow) on glide. stripe b controls the expression of several genes involved in early tendon cell differentiation (left panel) as well as its own expression (Vorbruggen and Jackle, 1997); glide-glide2 have no influence on their expression (left panel). glide, glide2, and stripe b, are able to induce alien expression, indicating that the two pathways have common targets. Whether this regulation is direct or indirect remains to be determined (broken arrows). The glide complex directly activates its own pathway (Ent2). glide participates in stripe b regulation during late tendon cell differentiation. Finally, unknown glide, glide2, stripe b, alien and Ent2 targets are also indicated by a question mark.